CST to IOT Time Converter

Convert Central Standard Time (CST) to Indian Ocean Time (IOT). Both time zones are shown live below; current offset between them is 11 hours ahead.

Chicago · Central Standard Time
19:00:28
Tuesday, May 12, 2026
CDT · UTC-05:00
Diego Garcia · Indian Ocean Time
06:00:28
Wednesday, May 13, 2026
GMT+6 · UTC+06:00

Convert a specific time

From: CST (Chicago)
To: IOT (Diego Garcia)
--:--

Daylight Saving status right now

CST (Central Standard Time)
Observes DST
Yes
In DST right now
Yes
Next fall back
2026-11-01
Offset shift
UTC-05:00 → UTC-06:00
IOT (Indian Ocean Time)
Observes DST
No

Heads up: CST observes DST while IOT does not. The 11-hour difference shown above will shift by one hour when CST starts or ends DST.

When can CST and IOT meet?

00
01
02
03
04
05
06
07
08
09
10
11
12
13
14
15
16
17
18
19
20
21
22
23
CST
IOT
Both zones in working hours (9am-5pm)
One zone working
Off-hours
Columns are hours of the day in Chicago (CST). Each row shows the local working-hours state in that zone for the same moment in time.
No business-hours overlap exists between CST and IOT.
The two zones are too far apart for synchronous meetings during normal working hours. Plan async or schedule outside 9-5 on at least one side.

Hour-by-hour CST to IOT conversion table

CST time (Chicago)IOT time (Diego Garcia)Status
00:00 Tue11:00 TueIOT working
01:00 Tue12:00 TueIOT working
02:00 Tue13:00 TueIOT working
03:00 Tue14:00 TueIOT working
04:00 Tue15:00 TueIOT working
05:00 Tue16:00 TueIOT working
06:00 Tue17:00 TueOff-hours both sides
07:00 Tue18:00 TueOff-hours both sides
08:00 Tue19:00 TueOff-hours both sides
09:00 Tue20:00 TueCST working
10:00 Tue21:00 TueCST working
11:00 Tue22:00 TueCST working
12:00 Tue23:00 TueCST working
13:00 Tue00:00 WedCST working
14:00 Tue01:00 WedCST working
15:00 Tue02:00 WedCST working
16:00 Tue03:00 WedCST working
17:00 Tue04:00 WedOff-hours both sides
18:00 Tue05:00 WedOff-hours both sides
19:00 Tue06:00 WedOff-hours both sides
20:00 Tue07:00 WedOff-hours both sides
21:00 Tue08:00 WedOff-hours both sides
22:00 Tue09:00 WedIOT working
23:00 Tue10:00 WedIOT working

Times computed for today in each zone using the IANA time zone database. The conversion accounts for daylight saving time wherever applicable.

About these time zones

Central Standard Time (CST)
IANA identifier
America/Chicago
Current UTC offset
UTC-05:00
Current abbreviation
CDT
Major cities in this zone
ChicagoHoustonDallasAustinNew Orleans
Indian Ocean Time (IOT)
IANA identifier
Indian/Chagos
Current UTC offset
UTC+06:00
Current abbreviation
GMT+6
Major cities in this zone
Diego Garcia

Sun today in Chicago and Diego Garcia

Chicago
Sunrise
05:34
Sunset
20:01
Solar noon
12:48
Daylight
14h 26m

Related converters

IOT to CST (reverse)CST to ESTCST to PSTCST to GMTCST to UTCCST to CETEST to IOTPST to IOTGMT to IOTUTC to IOTCET to IOT
Looking for local time? See time in Chicago or time in Diego Garcia.

Frequently asked questions

What is the time difference between CST and IOT right now?+
IOT (Indian Ocean Time) is currently 11 hours ahead CST (Central Standard Time). The exact difference can change when one or both zones transition into or out of daylight saving time.
Does CST or IOT observe daylight saving time?+
CST: observes daylight saving time. IOT: does not observe daylight saving time.
When is the best time to schedule a meeting between CST and IOT?+
CST and IOT have no business-hour overlap, even at the edges of a typical workday. Async collaboration or non-9-5 scheduling is the practical choice.
What time is it in Diego Garcia when it is 12:00 noon in Chicago?+
When it is 12:00 Tue in Chicago (CST), it is 23:00 Tue in Diego Garcia (IOT).
Which IANA time zone identifiers are used for CST and IOT?+
CST maps to "America/Chicago" in the IANA database. IOT maps to "Indian/Chagos". These identifiers are what most software libraries use to convert times accurately, including DST handling.
Is Chicago ahead of or behind Diego Garcia?+
Whether Chicago (CST) is ahead of or behind Diego Garcia (IOT) depends on the current UTC offsets. Right now IOT is 11 hours ahead CST. The live converter and side-by-side clocks above always reflect the current direction.
What are the current UTC offsets for CST and IOT?+
CST is UTC-05:00 (CDT) and IOT is UTC+06:00 (GMT+6). Both offsets shift by one hour when the corresponding region enters or exits daylight saving time, so the live values on this page are the source of truth.
Can I schedule meetings during business hours for both CST and IOT?+
No standard business-hours overlap exists between CST and IOT. Plan asynchronous work or schedule outside 9-5 on at least one side.